/*
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 * and open the template in the editor.
 */
package dkvklocka;

/**
 *
 * @author max.gabrielsson
 */
import java.io.InputStream;
import java.io.OutputStream;
import gnu.io.CommPortIdentifier; 
import gnu.io.SerialPort;
import gnu.io.SerialPortEvent; 
import gnu.io.SerialPortEventListener; 
import java.io.IOException;
import java.util.Enumeration;
import java.util.Observable;

public class SerialListener extends Observable implements SerialPortEventListener, ISerialListener {
	SerialPort serialPort;
        private String value;

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }
        /** The port we're normally going to use. */
	private static final String PORT_NAMES[] = { 
			"/dev/tty.usbserial-A9007UX1", // Mac OS X
			"/dev/ttyUSB0", // Linux
			"COM5", // Windows
                        DkvPropUtils.getProperty("dkvklocka.seriallistener.portname")
			};
	/** Buffered input stream from the port */
	private InputStream input;
	/** The output stream to the port */
	private OutputStream output;

	

	/**
	 * This should be called when you stop using the port.
	 * This will prevent port locking on platforms like Linux.
	 */
	public synchronized void close() {
		if (serialPort != null) {
			serialPort.removeEventListener();
			serialPort.close();
		}
                
	}
        
         
         public void initialize() {
		CommPortIdentifier portId = null;
                Enumeration portEnum = null;
                String error = ""; 
                try {
                  portEnum = CommPortIdentifier.getPortIdentifiers();
                } catch (Exception e) {
                 
                 sendChunk(e.getStackTrace().toString());
                 return;
                 
                }
		
		// iterate through, looking for the port
		while (portEnum.hasMoreElements()) {
			CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement();
			for (String portName : PORT_NAMES) {
				if (currPortId.getName().equals(portName)) {
					portId = currPortId;
					break;
				}
			}
		}

		if (portId == null) {
                    
			System.out.println("Could not find COM port.");
			return;
		}

		try {
			// open serial port, and use class name for the appName.
			serialPort = (SerialPort) portId.open(this.getClass().getName(),
					Integer.valueOf(DkvPropUtils.getProperty("dkvklocka.seriallistener.timeout")));

			// set port parameters
			serialPort.setSerialPortParams(Integer.valueOf(DkvPropUtils.getProperty("dkvklocka.seriallistener.datarate")),
					SerialPort.DATABITS_8,
					SerialPort.STOPBITS_1,
					SerialPort.PARITY_NONE);

			// open the streams
			input = serialPort.getInputStream();
			output = serialPort.getOutputStream();

			// add event listeners
			serialPort.addEventListener(this);
			serialPort.notifyOnDataAvailable(true);
                       
		} catch (Exception e) {
			System.err.println(e.toString());
		}
                
         
	}
	/**
	 * Handle an event on the serial port. Read the data and print it.
	 */
	public synchronized void serialEvent(SerialPortEvent oEvent) {
		if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
			try {
				int available = input.available();
				byte chunk[] = new byte[available];
				input.read(chunk, 0, available);
                             
				// Displayed results are codepage dependent
				value = new String(chunk);
                                sendChunk(value);
                              
                                
			} catch (Exception e) {
				System.err.println(e.toString());
			}
		}
		// Ignore all the other eventTypes, but you should consider the other ones.
	}

    public void sendChunk(String value) {
        setChanged();
        notifyObservers(value);
    }
    
     public void setSetting(String value) {
        try {
        output.write(value.getBytes());
        //soutput.flush();
        } catch (IOException e){
            e.printStackTrace();
        }
    }

	
}